1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2021 Advanced Micro Devices, Inc. 7 // 8 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> 9 10 /* 11 * Generic interface for ACP audio blck PCM component 12 */ 13 14 #include <linux/platform_device.h> 15 #include <linux/module.h> 16 #include <linux/err.h> 17 #include <linux/io.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include <sound/soc-dai.h> 21 #include <linux/dma-mapping.h> 22 23 #include "amd.h" 24 #include "../mach-config.h" 25 #include "acp-mach.h" 26 27 #define DRV_NAME "acp_i2s_dma" 28 29 static const struct snd_pcm_hardware acp_pcm_hardware_playback = { 30 .info = SNDRV_PCM_INFO_INTERLEAVED | 31 SNDRV_PCM_INFO_BLOCK_TRANSFER | 32 SNDRV_PCM_INFO_BATCH | 33 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 34 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 35 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 36 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 37 SNDRV_PCM_FMTBIT_S32_LE, 38 .channels_min = 2, 39 .channels_max = 8, 40 .rates = SNDRV_PCM_RATE_8000_96000, 41 .rate_min = 8000, 42 .rate_max = 96000, 43 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, 44 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, 45 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, 46 .periods_min = PLAYBACK_MIN_NUM_PERIODS, 47 .periods_max = PLAYBACK_MAX_NUM_PERIODS, 48 }; 49 50 static const struct snd_pcm_hardware acp_pcm_hardware_capture = { 51 .info = SNDRV_PCM_INFO_INTERLEAVED | 52 SNDRV_PCM_INFO_BLOCK_TRANSFER | 53 SNDRV_PCM_INFO_BATCH | 54 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 55 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 56 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 57 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 58 SNDRV_PCM_FMTBIT_S32_LE, 59 .channels_min = 2, 60 .channels_max = 2, 61 .rates = SNDRV_PCM_RATE_8000_48000, 62 .rate_min = 8000, 63 .rate_max = 48000, 64 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 65 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 66 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 67 .periods_min = CAPTURE_MIN_NUM_PERIODS, 68 .periods_max = CAPTURE_MAX_NUM_PERIODS, 69 }; 70 71 int acp_machine_select(struct acp_dev_data *adata) 72 { 73 struct snd_soc_acpi_mach *mach; 74 int size, platform; 75 76 if (adata->flag == FLAG_AMD_LEGACY_ONLY_DMIC) { 77 platform = adata->platform; 78 adata->mach_dev = platform_device_register_data(adata->dev, "acp-pdm-mach", 79 PLATFORM_DEVID_NONE, &platform, 80 sizeof(platform)); 81 } else { 82 size = sizeof(*adata->machines); 83 mach = snd_soc_acpi_find_machine(adata->machines); 84 if (!mach) { 85 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n"); 86 return -EINVAL; 87 } 88 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name, 89 PLATFORM_DEVID_NONE, mach, size); 90 } 91 if (IS_ERR(adata->mach_dev)) 92 dev_warn(adata->dev, "Unable to register Machine device\n"); 93 return 0; 94 } 95 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON); 96 97 static irqreturn_t i2s_irq_handler(int irq, void *data) 98 { 99 struct acp_dev_data *adata = data; 100 struct acp_resource *rsrc = adata->rsrc; 101 struct acp_stream *stream; 102 u16 i2s_flag = 0; 103 u32 ext_intr_stat, ext_intr_stat1; 104 105 if (!adata) 106 return IRQ_NONE; 107 108 if (adata->rsrc->no_of_ctrls == 2) 109 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1))); 110 111 ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 112 113 spin_lock(&adata->acp_lock); 114 list_for_each_entry(stream, &adata->stream_list, list) { 115 if (ext_intr_stat & stream->irq_bit) { 116 writel(stream->irq_bit, 117 ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 118 snd_pcm_period_elapsed(stream->substream); 119 i2s_flag = 1; 120 } 121 if (adata->rsrc->no_of_ctrls == 2) { 122 if (ext_intr_stat1 & stream->irq_bit) { 123 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata, 124 (rsrc->irqp_used - 1))); 125 snd_pcm_period_elapsed(stream->substream); 126 i2s_flag = 1; 127 } 128 } 129 } 130 spin_unlock(&adata->acp_lock); 131 if (i2s_flag) 132 return IRQ_HANDLED; 133 134 return IRQ_NONE; 135 } 136 137 void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream) 138 { 139 struct acp_resource *rsrc = adata->rsrc; 140 u32 pte_reg, pte_size, reg_val; 141 142 /* Use ATU base Group5 */ 143 pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5; 144 pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5; 145 stream->reg_offset = 0x02000000; 146 147 /* Group Enable */ 148 reg_val = rsrc->sram_pte_offset; 149 writel(reg_val | BIT(31), adata->acp_base + pte_reg); 150 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size); 151 writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL); 152 } 153 EXPORT_SYMBOL_NS_GPL(config_pte_for_stream, SND_SOC_ACP_COMMON); 154 155 void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size) 156 { 157 struct snd_pcm_substream *substream = stream->substream; 158 struct acp_resource *rsrc = adata->rsrc; 159 dma_addr_t addr = substream->dma_buffer.addr; 160 int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); 161 u32 low, high, val; 162 u16 page_idx; 163 164 val = stream->pte_offset; 165 166 for (page_idx = 0; page_idx < num_pages; page_idx++) { 167 /* Load the low address of page int ACP SRAM through SRBM */ 168 low = lower_32_bits(addr); 169 high = upper_32_bits(addr); 170 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val); 171 high |= BIT(31); 172 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4); 173 174 /* Move to next physically contiguous page */ 175 val += 8; 176 addr += PAGE_SIZE; 177 } 178 } 179 EXPORT_SYMBOL_NS_GPL(config_acp_dma, SND_SOC_ACP_COMMON); 180 181 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) 182 { 183 struct snd_pcm_runtime *runtime = substream->runtime; 184 struct device *dev = component->dev; 185 struct acp_dev_data *adata = dev_get_drvdata(dev); 186 struct acp_stream *stream; 187 int ret; 188 189 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 190 if (!stream) 191 return -ENOMEM; 192 193 stream->substream = substream; 194 195 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 196 runtime->hw = acp_pcm_hardware_playback; 197 else 198 runtime->hw = acp_pcm_hardware_capture; 199 200 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE); 201 if (ret) { 202 dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n"); 203 kfree(stream); 204 return ret; 205 } 206 207 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE); 208 if (ret) { 209 dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n"); 210 kfree(stream); 211 return ret; 212 } 213 214 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 215 if (ret < 0) { 216 dev_err(component->dev, "set integer constraint failed\n"); 217 kfree(stream); 218 return ret; 219 } 220 runtime->private_data = stream; 221 222 writel(1, ACP_EXTERNAL_INTR_ENB(adata)); 223 224 spin_lock_irq(&adata->acp_lock); 225 list_add_tail(&stream->list, &adata->stream_list); 226 spin_unlock_irq(&adata->acp_lock); 227 228 return ret; 229 } 230 231 static int acp_dma_hw_params(struct snd_soc_component *component, 232 struct snd_pcm_substream *substream, 233 struct snd_pcm_hw_params *params) 234 { 235 struct acp_dev_data *adata = snd_soc_component_get_drvdata(component); 236 struct acp_stream *stream = substream->runtime->private_data; 237 u64 size = params_buffer_bytes(params); 238 239 /* Configure ACP DMA block with params */ 240 config_pte_for_stream(adata, stream); 241 config_acp_dma(adata, stream, size); 242 243 return 0; 244 } 245 246 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component, 247 struct snd_pcm_substream *substream) 248 { 249 struct device *dev = component->dev; 250 struct acp_dev_data *adata = dev_get_drvdata(dev); 251 struct acp_stream *stream = substream->runtime->private_data; 252 u32 pos, buffersize; 253 u64 bytescount; 254 255 buffersize = frames_to_bytes(substream->runtime, 256 substream->runtime->buffer_size); 257 258 bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); 259 260 if (bytescount > stream->bytescount) 261 bytescount -= stream->bytescount; 262 263 pos = do_div(bytescount, buffersize); 264 265 return bytes_to_frames(substream->runtime, pos); 266 } 267 268 static int acp_dma_new(struct snd_soc_component *component, 269 struct snd_soc_pcm_runtime *rtd) 270 { 271 struct device *parent = component->dev->parent; 272 273 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, 274 parent, MIN_BUFFER, MAX_BUFFER); 275 return 0; 276 } 277 278 static int acp_dma_close(struct snd_soc_component *component, 279 struct snd_pcm_substream *substream) 280 { 281 struct device *dev = component->dev; 282 struct acp_dev_data *adata = dev_get_drvdata(dev); 283 struct acp_stream *stream = substream->runtime->private_data; 284 285 /* Remove entry from list */ 286 spin_lock_irq(&adata->acp_lock); 287 list_del(&stream->list); 288 spin_unlock_irq(&adata->acp_lock); 289 kfree(stream); 290 291 return 0; 292 } 293 294 static const struct snd_soc_component_driver acp_pcm_component = { 295 .name = DRV_NAME, 296 .open = acp_dma_open, 297 .close = acp_dma_close, 298 .hw_params = acp_dma_hw_params, 299 .pointer = acp_dma_pointer, 300 .pcm_construct = acp_dma_new, 301 .legacy_dai_naming = 1, 302 }; 303 304 int acp_platform_register(struct device *dev) 305 { 306 struct acp_dev_data *adata = dev_get_drvdata(dev); 307 struct snd_soc_dai_driver; 308 unsigned int status; 309 310 status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler, 311 IRQF_SHARED, "ACP_I2S_IRQ", adata); 312 if (status) { 313 dev_err(dev, "ACP I2S IRQ request failed\n"); 314 return status; 315 } 316 317 status = devm_snd_soc_register_component(dev, &acp_pcm_component, 318 adata->dai_driver, 319 adata->num_dai); 320 if (status) { 321 dev_err(dev, "Fail to register acp i2s component\n"); 322 return status; 323 } 324 325 INIT_LIST_HEAD(&adata->stream_list); 326 spin_lock_init(&adata->acp_lock); 327 328 return 0; 329 } 330 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON); 331 332 int acp_platform_unregister(struct device *dev) 333 { 334 struct acp_dev_data *adata = dev_get_drvdata(dev); 335 336 if (adata->mach_dev) 337 platform_device_unregister(adata->mach_dev); 338 return 0; 339 } 340 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON); 341 342 MODULE_DESCRIPTION("AMD ACP PCM Driver"); 343 MODULE_LICENSE("Dual BSD/GPL"); 344 MODULE_ALIAS(DRV_NAME); 345